Washington County, WI Demographics
Washington County, WI is the 11th most populous of 72 counties in Wisconsin, with 136,761 residents across 431 square miles. That is about 318 people per square mile.
At the 2020 census
| Population | 136,761 |
|---|---|
| Land area | 431 sq mi |
| Density | 318 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Washington County compares to the US
We're computing this county's comparison table — check back shortly. Population, land area, and density above are already exact.
Central Location: Washington County, WI
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Washington County, WI — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Washington County, WI
Related places
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Nearest counties
Metro areas containing Washington County
About this page
This page shows demographics for a US county from the 2020 census and the American Community Survey: population, land area, density, urban share, and how the county compares to national averages for income, housing, age, and more.
Counties subdivide into census tracts, listed below with their populations. The drive-time and radius tables measure the population around the county's main population center.